Improvement in heaters



I. D. SMEAD.

HEATER.

110,183,075. Patented 0Ct.1.1876.

l in any convenient manner.

UNITED STATES- PATENT OFFICEo ISAAC D. SMEAD, OF BLOOMINGTON, ILLINOIS.

IMPROVEMENT IN HEATERS.

Specification forming part of Letters Patent No. 183,075, dated October 10, 1876; application led September 4, 1876.

To all whom it may concern:

Be it known that I, IsAAo D. SMEAD, of Bloomington, lllinois, have invented certain new and useful Improvements in School-Room Heaters; and I do hereby declare that the following is a full, clear, and exact description of the same, reference being made to the accompanying drawing, forming a part of this speciiication, and in Which- Figure l is a perspective view of my improved heater, with one side of the case broken away to show the internal arrangement of parts. Fig. 2 is a longitudinal vertical section. Fig. 3 is a transverse vertical section.

This invention consists of certain improvements in the construction of school-room heaters, as will be hereinafter fully described, and pointed out in the claim. i,

A in the drawing represents the outer casing of the heater, which is made ot' cast-iron formed in sections, as clearly shown in the drawing, said sections being secured together B represents the tire-box, the top b thereto being made slanting from the front otl the heater to the rear thereof, so that the smoke is forced down to the body ot' burning fuel, for the purpose of igniting the smoke and consuming the gas that would otherwise escape. O is the main vertical iiue, communicating directly with the rear of tire-box, into which the smoke passes, and from which it is drawn through a series of inclined tubes, D, into the front flue or chamber E, and thence through the large tubes F into main flue C, from whence it is carried ott'. The tubes D incline downward from the front of heater to the main iiue C, so that they will not ll with soot, as by their inclination they will easily clean themselves. c is a damper, arranged in the main iue between the openings communicating With the inclined tubes and the openings of the large tubes F. This damper is closed, so as to allow the smoke to pass through the inclined tubes, as above described, and said damper allowed to be turned, so as to give a direct draft up through the main ilne, when the tire-box door is opened, and thereby prevent the smoke coming out into the room.

Any desired apparatus may be employed to connect the tire-box door with the damper c in the main line, whereby the damper will be opened, when the fire-box door is opened, for preventing the smoke coming into the room.

H are the upper doors, which are to be opened when it is desired to clean out the ues, in case they should get stopped un. I represents the fire-box door, and J ti. doors to the ash-box or grate.

The cold air is admitted through suitable openings in the bottom of the heater into the space G, surrounded by the outer case A, from whence it passes upward, and is heated by coming in contact with the tire-box and series of tubes D F, and tinally escaping through top of heater into the room.

it will be observed that the main vertical iue C, communicating directly with the rear of fire-box, allows the soot from the inclined smoke-tubes to fall directly back into the lirebox.

I claim as my invention- The combination, in a portable school-room heater, of the iirebox B, having slanting top b, main vertical flue U, communicating directly with rear ot' tire-box, inclined smoke-tubes D, ue or chamber E, and horizontal tubes F, the several parts being constructed and arranged in the manner substantially as and for the purpose specified.

ISAAC D. SMEAD.

Witnesses:

CHARLES FIsHER, Trios. SLADE. 

